15 small white orbs drifting high in formation west Over SF, CA City Hall 9-20-08

Against a blight blue sky, my wife and I saw a relatively static but drifting formation of 15 roundish white orbs that stayed relatively the same distance from each other while the entire formation moved slowly to the west. These object were more visible with polarized glasses but not so with the naked eye. We had no binoculars to assist.

We took one digital picture (Canon 10 MP camera) which caught it but only shows rounded orbs at extreme magnification.

This was over the SF City Hall. These did not look like planes or circling birds. The formation was not a regularly spaced formation.